You predict Bangladesh will win upcoming series against Pakistan mainly because Pakistan is missing key players like Babar Azam Shaheen Shah Afridi and Mohammad Rizwan which significantly weakens their team and gives Bangladesh big home advantage. Pakistan cricket board looks to be testing new players for upcoming Asia Cup which is good long term plan but risky in short term as it leaves them vulnerable against strong Bangladesh side. But new Pakistani players will try to their best to perform well and Bangladesh is playing at home and will be motivated so your prediction favoring Bangladesh is logical but we know that cricket always has element of surprise.